如何使用django rest框架从GET请求的查询参数中过滤多个ID？ [英] How to filter for multiple ids from a query param on a GET request with django rest framework?

问题描述

我正在尝试制作一个网络应用程序API。我想提出一个可以提交多个ID的API请求。

I'm trying to make a web app API. I want to make an API request where multiple ids can be submitted.

django rest框架教程显示了如何从模型中获取所有记录。例如， http://127.0.0.1:8000/snippets/ 将返回所有代码段记录。本教程还显示了如何从模型中检索单个项目。 http://127.0.0.1:8000/snippets/2/ 将仅返回具有以下内容的代码段记录pk = 2。

The django rest framework tutorial shows how to get all records from a model. For example http://127.0.0.1:8000/snippets/ will return all snippet records. The tutorial also shows how to retrieve a single item from a model. http://127.0.0.1:8000/snippets/2/ will return only snippet record with pk=2.

我希望能够请求多个记录，但不是所有记录。

I'd like to be able to request multiple records, but not all records.

我怎么能更改此代码，以便我可以请求多个代码段？

How could I change this code so I could request multiple snippets?

snippets / urls.py

snippets/urls.py

from django.conf.urls import url
from snippets import views

urlpatterns = [
    url(r'^snippets/$', views.snippet_list),
    url(r'^snippets/(?P<pk>[0-9]+)/$', views.snippet_detail),
]

snippets / views.py

snippets/views.py

def snippet_detail(request, *pk):
    try:
        snippet = Snippet.objects.filter(pk__in=pk)
    except Snippet.DoesNotExist:
        return HttpResponse(status=404)

    if request.method == 'GET':
        serializer = SnippetSerializer(snippet)
        return JSONResponse(serializer.data)

推荐答案

根据您的评论，您可以通过url发送ID：

Based in your comment, you could send the ids via url:

127.0.0.1:8000/snippets/?ids=2,3,4

，并且在您看来

...
ids = request.GET.get('ids')  # u'2,3,4' <- this is unicode
ids = ids.split(',')  # [u'2',u'3',u'4'] <- this is a list of unicodes with ids values

的Unicode列表，然后您可以查询Snippet模型：

Then you can query to Snippet model:

Snippet.objects.filter(pk__in=ids)

如果url中的id之间有空格，这可能会给您带来一些问题：

This could give you some problems if there's spaces between ids in url:

127.0.0.1:8000/snippets/?ids=2, 3 , 4

您可能需要每个执行查询之前的值

You could need process every value before perform a query

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